That should be fine %, wouldn't bump it more than 55-60%. If you bump too much they can end up glued. They are making progress that's good.
They can take a full day to hatch out from external pip. Don't know your bator. Most people they hatch out just fine on their own.
I have humidity issues with my el cheapo bator/dry house and do often have to help mine out. If you can peel a tiny bit of the shell off and the membrane is papery dry and detached from the shell, you may need to help yours also. The problem is if you rupture a blood vessal getting too aggressive, they can bleed out. As long as making progress I'd let them go. If they went all day and still only had a small beak hole I'd chip a small bit of shell away and check how dry the membrane is. There have been times when I've broken off shell a very small piece at a time, slowly, and the membrane was totally shrunk away from the shell and dry like paper! I'd take a bit of shell off like dime size around the beack, do a small tear of membrane if no veining - STOP IMMEDIATELY if the slightest bleed. Put them back in the bator. A couple hours later, maybe a bit more so the head is clear, giving them a chance to emerge themselves with just a bit of help.